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Custom EPS Motor Shaft for Steering Systems

The EPS motor shaft is a core transmission component within electric power steering systems. Manufactured strictly according to customer-provided drawings and specifications, our shafts are produced utilizing our advanced machining capabilities to achieve critical dimensional accuracies, including roundness of 2µm and runout of 5µm at key journal positions. These precision tolerances effectively eliminate bearing clearance deviations at the source, ensuring high responsiveness in motor actuation, superior NVH (Noise, Vibration, Harshness) performance, and extended durability. The resulting steering feel is smooth and free from judder or hesitation, meeting the most demanding requirements of modern steering systems.

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    Specificationscharacteristic parameter

    Product Specifications

    Customizable sizes and profiles available upon request

    Material

    40Cr or other material specified per drawing

    Heat Treatment

    As specified per drawing

    Key Precision Tolerances

    Roundness ≤ 2µm / Runout ≤ 5µm (at critical journal positions)

    Application

    EPS (Electric Power Steering) systems for vehicles

    Operating Environment

    High temperature, high humidity, corrosive conditions

    Product RoleApplication Scenarios

    EPS motor shafts are critical components in modern electric power steering systems, enabling precise torque transmission and responsive steering control. Our products are manufactured to customer-supplied drawings and are widely used across a broad range of vehicle platforms:

    ● Passenger cars (sedans, SUVs, and luxury models)

    ● Electric vehicles (BEVs, PHEVs)

    ● Commercial vehicles with EPS integration

    ● Emerging steering system architectures (steer-by-wire ready)

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      Steel sheet uncoiling

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      choose ussolutions

      We offer fully custom-manufactured EPS motor shaft solutions based on customer-provided drawings and specifications. Shaft diameters, lengths, gear profiles, spline configurations, journal positions, and surface finish requirements are all produced in strict accordance with client designs. Our advanced machining capabilities allow us to consistently achieve tight tolerances – including 2µm roundness and 5µm runout – as required by customer prints. Whether for high-volume OEM production or specialized steering system projects, our shafts deliver consistent quality, precision actuation, and reliable long-term service life.

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      SummaryAutomotive Industry System

      Manufactured under strict quality control systems certified to IATF 16949, our EPS motor shafts undergo comprehensive inspections prior to shipment, including dimensional verification, roundness and runout testing, hardness validation, and surface integrity evaluation – all performed in accordance with customer drawing requirements.

      In summary, our EPS Motor Shaft combines precision machining, strict adherence to customer specifications, and robust quality assurance, making it a trusted choice for automotive manufacturers and tier-one suppliers seeking high-performance steering components for both conventional and electrified vehicle platforms.

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